Lining for furnaces



jizezz C. camz@ E. O. CONDIT.

LINING POR FURNAVGBS.

Patented Mar. 1, 1887. gl.

(No Moda.)

Sterns EZEKIEL C. CONDIT, OF KANSAS CITY, MISSOURI.

LBNING vFOR FURNACES.

SPECIFICATION forming `part of Letters Patent No. 358,545, dated March1, 1887.

Application tiled March 1G, 1856. Serial No. 195,450. (No model.)

To @ZZ whom t may concern:

Be it known that l, EZEKIEL C. CONDIT, of Kansas City, in the county ot'Jackson and State of Missouri, have invented certain new and usefulImprovements in Linings for Fui naces, &c., of which the following is aspecifi` cation.

My invention relates to linings for the fireboXes of furnaces, stoves,and the like; and the invention consists in a novel construction of theplates with air-passages, as hereinafter more fully described. i

Figure lisa transverse vertical section of a circular iirepot withm'yimproved lining in position. Fig. 2 is a top plan view of the lining,shown partly in section on the line x w of Fig. 1. Fig. 3 is a front orface view of a lining-plate adapted for use in a rectangular {ireboX,and having a portion shown in section to better illustrate itsconstruction.

' It has long been common to line the fireboxes of furnaces and stoveswith plates oi' fire-brick, and also of metal, especially when used forburning coal; and in order to properly deliver the air designed tosupport combustion the lining-plates have been corrugated and alsoperforated in various ways. It is also well known that combustion isaccelerated or rendered more perfect by delivering the air in a heatedcondition7 and various plans and appa ratus have been devised for thatpurpose.

The obj ect of my present invention is to produce a lining for hot-airfurnaces, stoves, die., which will serve to heat and deliver the airmore effectually, and which will allow for expansion and contraction,thereby preventing fracture and rendering the lining more durable.

These linings are more especially designed for use in the Ruttan andsimilar warm-air furnaces which are used for heating large buildings,andin which soft coal is generally used as fuel. As soft coal producesmuch more smoke than hard coal, it is especially desirable that a largevolume of highly-heated air be mingled with the smoke and gases producedby the burning coal in order to more effectually consume the same, andthat is one of the principal objects of my invention.

These linings I usually construct of cast-iron, they being cast incircular or rectangular form, to suit the re-pot in which they are to beused.

The body of the plate A is provided with a series of cells, c, as shownin Figs. l, 2, and 3, which are open at the bottom for the freeadmission of air, and which extend upward to near the top of the plate,as shown in Figs. l and 2. Each of these cells c has a slit, e, eX-tending from it out through the front face 0f the plate, and whichextends vertically the entire width of the plate, as shown, the cells'cand slits e being located near together throughout the whole extent ofthe plate or lining, as shown in the several figures.

I have shown the lining as being provided with an inclinedflange, C, atits upper edge, which is designed to fit closely against the wall oftheiire-boX, so as to prevent the air from passing up behind the lining andcompel it to enter the cells c at the bottom. This llange C may bedispensed with, the only requisite in that respect being that the upperedge of the lining shall iit against the walls A of the rebox, whateverits form may be, in such a manner as to practically prevent the air frompassing up behind the plate.

lVith alining thus constructed it will be seen that a large amount ofair will enter the cells c and pass out through the slits c all the Wayup, and that, as the lining-plates will necessarily be kept very hot bydirect contact with the burning coal, the air passing upward through thecells and inward through the slits will be heated to a high degree, andwill thus be in the best possible condition for rendering the combustionof the smoke and gases cornplete. The inwardly-curved top of the cells calso tends to throw or deflect the heated air inward as it escapestherefrom, thus, as it were, injecting it into and causing it to morethor oughly mingle with the gases and smoke as. they rise from the fuel.It will also be seen that by this construction I dividethe inflowing airup into a large number of small currents or streams, by which it is morethoroughly and highly heated and more effectually mingled with theproducts of combustion.

Vhile I have shown the lining B in Fig. 2 as being corrugated on itsexterior surface, it is obvious that it may bemade plain, if desired;but the plan shown secures a more uniform thickness of metal, and it istherefore less liable to crack by the heat. The slits in the face of theplate, while serving to admit air to the fuel all the way up from bottomto top,

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also serve to permit the plate to expand and contract Without cracking.

While I have described this lining as being designed more especially foruse with soft coal, it is obvious that it is equally applicable tofurnaces or/stoves using eitherhard coal or Wood, and that it may bemade of fire-clay as Well as of iron, and that the circular1 ones may bemade complete in one piece or in sections, as may be most convenient,much depending on the size of the heater or re-pot.

I am aware that repots for stoves have been patented having verticalholes in their Walls, with small holes at various points for the passageof air; that one has also been lpatented with vertical dues for thepassage of the unconsumed gases, and that a back plate for stoves hasbeen patented in which the body of the plate is composed of a series oftriangular bars, and therefore I do not claim such; but

The herein described lining for furnaces, consisting of one or moreplates, B, provided with the vertical cells c, closed at their upperends and having their lower ends open outside of the grate-space, withthe vertical slits ,6, connecting said cells c with the inner surface ofthe plate from the top to the bottom of said plate, substantially asshown and described.

EZEKIEL G. CON DIT.

Vitnesses:

Rom?. T. HOLT, N. A. LANPHEAR.

